SMZ/SNZ and gibberellin signaling are required for nitrate-elicited delay of flowering time in Arabidopsis thaliana.
SMZ/SNZ and gibberellin signaling are required for nitrate-elicited delay of flowering time in Arabidopsis thaliana.
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DOI：
10.1093/jxb/erx423
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发表时间：
2018-01-23
影响因子：
6.9
通讯作者：
Gutiérrez RA
中科院分区：
文献类型：
--
作者：
Gras DE;Vidal EA;Undurraga SF;Riveras E;Moreno S;Dominguez-Figueroa J;Alabadi D;Blázquez MA;Medina J;Gutiérrez RA
硝酸盐抑制赤霉素途径，随后激活开花抑制子SMZ和SNZ，延迟拟南芥的开花时间。植物的繁殖成功在很大程度上取决于发育阶段转换的正确编程，特别是从营养生长到生殖生长的转变。这一转变的时机是由一系列环境和内生因素的整合精心调控的。氮是植物需要量最大的矿物质常量营养素，因此其可用性对植物生长和发育的许多方面都有很大影响，包括开花时间。我们发现，硝酸盐信号与年龄相关的和赤霉素的途径相互作用，以控制开花时间在拟南芥。我们发现，属于AP 2型转录因子家族的开花时间抑制因子包括SCHLAFMUTZE（SMZ）和SCHNARCHZAPFEN（SNZ）是响应硝酸盐的开花时间的重要调节因子。我们的研究结果支持一个模型，硝酸盐激活SMZ和SNZ通过赤霉素途径抑制开花时间在拟南芥。
Nitrate represses the gibberellin pathway and subsequently activates the flowering repressors SMZ and SNZ, delaying flowering time in Arabidopsis. The reproductive success of plants largely depends on the correct programming of developmental phase transitions, particularly the shift from vegetative to reproductive growth. The timing of this transition is finely regulated by the integration of an array of environmental and endogenous factors. Nitrogen is the mineral macronutrient that plants require in the largest amount, and as such its availability greatly impacts on many aspects of plant growth and development, including flowering time. We found that nitrate signaling interacts with the age-related and gibberellic acid pathways to control flowering time in Arabidopsis thaliana. We revealed that repressors of flowering time belonging to the AP2-type transcription factor family including SCHLAFMUTZE (SMZ) and SCHNARCHZAPFEN (SNZ) are important regulators of flowering time in response to nitrate. Our results support a model whereby nitrate activates SMZ and SNZ via the gibberellin pathway to repress flowering time in Arabidopsis thaliana.
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